| 摘要 |
PURPOSE:To provide a thermal recording material having sufficient color developing density and color forming sensitivity, suitable for high-speed recording and having high ground whiteness and practicality, by using a specified zinc complex as a color developer and using at least one selected from specified naphthalene compounds as an auxiliary component, in a thermal recording material provided with a thermal color forming layer comprising a leuco dye and a color developer on a base. CONSTITUTION:A zinc complex of formula (I) is used as a color developer and at least one selected from naphthalene compounds of general formula (II) is used as an auxiliary component, in a thermal recording material employing a color forming reaction between a leuco dye and a color developer. In formula (I), R is an organic ligand capable of forming a complex by combining with zinc ion through a hetero-atom, k is 2 or 4, and X is SCN or halogen. In formula (II), R is alkyl, alkoxyl, halogen, subst. or unsubst. aralkyl or aryl, and an is 1-8. |
